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The Genesis solar wind sample return mission: Past, present, and future

Burnett, D. S. (2013) The Genesis solar wind sample return mission: Past, present, and future. Meteoritics and Planetary Science, 48 (12). pp. 2351-2370. ISSN 1086-9379. doi:10.1111/maps.12241.

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The Genesis Discovery mission returned solar matter in the form of the solar wind with the goal of obtaining precise solar isotopic abundances (for the first time) and greatly improved elemental abundances. Measurements of the light noble gases in regime samples demonstrate that isotopes are fractionated in the solar wind relative to the solar photosphere. Theory is required for correction. Measurement of the solar wind O and N isotopes shows that these are very different from any inner solar system materials. The solar O isotopic composition is consistent with photochemical self-shielding. For unknown reasons, the solar N isotopic composition is much lighter than essentially all other known solar system materials, except the atmosphere of Jupiter. Ne depth profiling on Genesis materials has demonstrated that Ne isotopic variations in lunar samples are due to isotopic fractionation during implantation without appealing to higher energy solar particles. Genesis provides a precise measurement of the isotopic differences of Ar between the solar wind and the terrestrial atmosphere. The Genesis isotopic compositions of Kr and Xe agree with data from lunar ilmenite separates, showing that lunar processes have not affected the ilmenite data and that solar wind composition has not changed on 100 Ma time scales. Relative to Genesis solar wind, ArKrXe in Q (the chondrite noble gas carrier) and the terrestrial atmosphere show relatively large light isotope depletions.

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Burnett, D. S.0000-0001-9521-8675
Additional Information:© 2013 The Meteoritical Society. Received 26 February 2013; revision accepted 10 April 2013. Article first published online: 6 Dec. 2013. This review is an expansion of the 2012 Leonard Medal address. The success of Genesis was a team effort, involving the work of hundreds of individuals. Management, payload design, and mission operations were carried out at the Jet Propulsion Laboratory (JPL). Spacecraft and recovery were carried out by Lockheed Martin Astronautics (Denver). Payload integration and postcrash recovery was smoothly executed by a JPL-JSC partnership. Contingency planning by the JSC Genesis Curatorial staff made possible the rapid postcrash recovery. A 2011 tabulation of scientists who worked on the planning, implementation, recovery, and analysis phases of the Genesis Discovery mission is available at DCSupplemental. I have benefitted from discussions as part of the Solar Wind Composition Working Group sponsored by the International Space Sciences Institute (ISSI, Bern). Important advice on this manuscript from Amy Jurewicz, Alex Meshik, Charles Hohenberg, Roger Wiens, and Julie Paque is gratefully acknowledged. Helpful reviews were obtained from A. Davis and an anonymous reviewer. This work was sponsored by NASA LARS grant: NNX09AC35G.
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Issue or Number:12
Record Number:CaltechAUTHORS:20140123-094533962
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Official Citation:Burnett, D. S. (2013), The Genesis solar wind sample return mission: Past, present, and future. Meteoritics & Planetary Science, 48: 2351–2370. doi: 10.1111/maps.12241
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43484
Deposited By: Tony Diaz
Deposited On:23 Jan 2014 22:53
Last Modified:10 Nov 2021 16:38

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